Maven multi project issue - maven

Question

I am having some issues with my multi-project Maven project.
The problem is the following:
I have a project that organized in the following way:
root
+-- pom.xml
!
+-- module1
! +-- pom.xml
+-- module2
+-- pom.xml
Where module2 depends on module1.
Module1 is packaged as war, it also generates jar file that module2 depends on.
Everything is fine whenever the changes are only in module2 i.e. module1.jar is already in remote repo, however whenever there are changes in both modules during mvn clean release:clean release:prepare release:perform I get an error saying that module1.jar could not be found in remote repo.
So to fix that I have added maven-install-plugin to the Module1's pom file like this:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<file>${project.build.directory}/${project.artifactId}-${project.version}.jar</file>
<!-- <packaging>jar</packaging> -->
</configuration>
<executions>
<execution>
<id>install</id>
<phase>compile</phase>
<goals>
<goal>install</goal>
</goals>
</execution>
</executions>
whenever i comment out <packaging>jar</packaging> it tries to install Module1 jar file into local repo as war file (I am guessing that by default it would pick up packaging from the POM file). So i get something like this:
[INFO] [INFO] [jar:jar {execution: creation}]
[INFO] [INFO] Building jar: ${project.build.directory}/${project.artifactId}-${project.version}.jar
[INFO] [INFO] [install:install {execution: install}]
[INFO] [INFO] Installing ${project.build.directory}/${project.artifactId}-${project.version}.jar to <.m2_local_repo>/<proper_path>/${project.version}/${project.artifactId}-${project.version}.war
However if i un-comment <packaging>jar</packaging> it complains that i am attempting to set a read-only property.
So the question i have, how can i install jar file to my local repo during my build?
Updating the question w/ some parts of module1 and module2 pom files:
module2 pom parts:
<parent>
<groupId>...</groupId>
<artifactId>...</artifactId>
<version>1.01-SNAPSHOT</version>
</parent>
<artifactId>module2</artifactId>
<version>1.08-SNAPSHOT</version>
<packaging>war</packaging>
...
<dependency>
<groupId>...</groupId>
<artifactId>module1</artifactId>
<version>4.18-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
module1 pom:
<parent>
<groupId>...</groupId>
<artifactId>...</artifactId>
<version>1.01-SNAPSHOT</version>
</parent>
<artifactId>module1</artifactId>
<version>4.18-SNAPSHOT</version>
<packaging>war</packaging>
i added install plugin to make sure that module1.4.18.jar will be installed locally so that module2.0.18.war will be able to use module1.4.18.jar

Answer 1

eventually i went with <goal>install-file</goal> instead of <goal>install</goal>
this way i was able to specify proper packaging (it turns out that packaging on install goal is read only, but you can override it for install-file)
so this is what i end up with:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.1</version>
<executions>
<execution>
<id>install</id>
<phase>compile</phase>
<goals>
<goal>install-file</goal>
</goals>
<configuration>
<file>${project.build.directory}/${project.artifactId}-${project.version}.jar</file>
<packaging>jar</packaging>
</configuration>
</execution>
</executions>
</plugin>
#MariuszS and #WIll- thank you for your insight on this matter

Answer 2

I think your project has wrong configuration (not in maven way). Proper configuration looks like this
* parent (root)
* module1 (war1)
* module2 (war2)
* jar (shared code from war2)
Move your code from war to separate module and add this module as depdency to both war modules.